Measuring instrument



-' Apr. 10, 1923. 1,451,572

W. R. GREEN `MEAsuRmcir INSTRUMENT Filed Mar. 18, '1921 f l 1u um, www.

INVENTOR Patented Apr. 10, 1923.

WILLIAM E.' GREEN, or nowNEns GROVE, ILLINOIS.y

MEASURING INSTRUMENT.

Application yfiled March 18, 1921. 'Serial No. 453,199.

To @Hicham t 'may concern Beit known'that I, kVVinLLari Craniatav` a citizen of the United.States,'residinfat Downers Grove, in the county of Du and State of Illinois, have invented new and useful Improvements in yMeasuring Instruments, of which the 'following is a specification.

vThis invention Vrelates toy measuring fin-4 particularly to the type V struments and more of instrument used by carpenters, cabinet makers or analogous tradesmen. Y y t,

An object of the invention is to provide a measuring instrument which may be employed inthe capacity of a square, compass and whereby the base and pyumb angle cuts of a rafter may be computed andinarked ofi"l in one 'setting of the rinstrument lwhich setting will also indicate ,V thelengthof the rafte Anotherobjectof this linvention is to pro-A videa measuring instrument as specified in which a pair of right angularly disposed arms are provided having their free ends con- Y. nected with a seginent'or quadrant greater than'a 90 'degree quadrant and also one in whichr a movable armor bladeis provided for movementr about an axis inwardly of the center junction of kthe lconnected ends of thel right' angularly disposed arms, thereby providing` a tool which contains a 90 degree quadrant ywithin one oflarger dimensions whereby when said armor blade is set or placed on any reading the device is automatically set for both the base and plumb angle lcuts of a rafter. v v e Another object of rthis invention is to provide'a measuringinstrument wherein' the movable arm yis constructed of sheet metalk pressed 'into/.shape and provided with a cutout portion having inclined reading surfaces at one end graduated for co-action Withethe graduations of the segment and which arm is providedto permit firm binding orclamping action thereof against its pivotal supportingba'se, in a right angle direction to prevent distortion kof the blade.

further object of this invention is to provide Va plurality of spaced notches onthe inner edge of one of said right angular arms'ywhich are adapted to permit use of the instrument or tool as a gauge, the said movable arm or' blade co-operating with the notched arm for setting the instrument to facilitate ruling or gauging action thereof.

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sau e., 01'y y clearly :therefrom @ther4 objects of the invention*will l pearin the following detailed description and `iny the. accompanying. drawing wherein Fig. lis a planview strument.

Fig. 2is an edge elevation ofthe yimproved .i

instrument.

Fig.v 3 is alongitudinal section through jthemovablearm of,y the instrument.-

Fig. 4 is anenlarged'fragmentary eleva-` 1 f tion of the measuring instrument.

ofthe improved-in- `eferrimg more. particularly to thev drawtheA instrument nected bya segment or quadrant 3.V As

grecs, surface as at 4 throughouta 90 degree arch', the 'initial or zero graduation 5 being spaced inwardly from the inneredgejof the arm shown in Fig. 1 of the drawing# the*l quadrant?) is 'greater than one kof= 90 de-:f:

and itis graduated `along-its innercomprises right angularly disposed arms l and 2 which are con-I nected and the-outer endsof y.whicharecon- 2 a distance equal to the distance inwardly of the 90 degree graduation y7 rfrom the inner 8 .ofthel army 1.- A boss 9 isnotched edge formed-integrallyvwith the arms 1 andl 2.

at their junction and projects `inwardly into Ithe space enclosed-'by thev `.arms and quadrant. AThe boss 9fis provided with an opening 1,0, the center of which is .1, l

in eXact alignment with the-graduations 5y vand 7 thereby providingl an accurate 90 dev gree quadrant-with the center-of` the boss 9 as an: axis within the larger quadrant formedby the arms 1 and v2 and segment.

The arms 1 and v2 arev raduated asindicated,A

atyll in anysuitable inear measuring system. i. i e v j A movable arm12is provided whichis formed of sheet me'tal and pressed into v shapeto provide a substantially rectangu-I'` lar arm which ishollow and which is split at one end as shown at 13 to engage over the bossf9. A shoulder sleeve 1.4'is inserted through the split end ofthe armk 12 andy kcrimped against theoutersurfaces of the arm, the said sleeve connecting the sides of kthe arm `and pivoting it to the boss 9. The

end of thearm opposite the end .which is provided with a split 13 is also split asat arm 12 is provided with inturned portions 16 extending at right anglesto the sides 17 of the arm and yadapted to have edge engagement with the quadrant 3, the said inl15 for engaging over the segment 3 and-'as clearly shown in Fig. 3 of the drawing, the

v outer surfaces of the segment The reading tongues 21 are ,graduated as shown 'at' 23, the said graduations being adaptedk to co-act with the graduations t to permit accurate setting or adjusting ot' the arm 12.

As shown in Figure 1 of the drawing the:

longitudinal center of the larm 12 aligns with the center .graduation 23 and also with the graduations 5 and 7 and the center oi the opening 10 when the arm 12 is moved so that one of itsed'ges engages the inner edge with a plurality of graduations 25 spaced at" -oi'. the arm 2 or thev other edge engages lthe inner edge of the arm 1. The formation of theihollow handle or arm 12, and the riveting of itstwo `sides together will provide lan arm of light weight construction and one which is relatively strong. v

- The innerV edge 8 of they arm-1 is provided any desired digit of linear measurement and these notchesare adaptedtoreceive a pencil point or scriber to permit use ol the instru.- ment as agauge. At such times/theinovable arm 12 is adjusted and set to ride along the edge of theL board to be marked or gauged and with the scriber in the-desired notch the `instrument is moved alongA the board providing accurate gauging. y'

The instrument -is provided with anopening 26 which may be used to insert a suitable i pivoting pin or point therethrough and then by placingthe scriber in anyone of the'4 notches! 25 and moving the instrument about rthe point inserted through the opening 26,

the instrument may be used as a compass.

Asv shown at 27 in Fig. 1 of the drawing the segment 3 is graduated to'indicate ,the`

lengths of the rafters and the respective length indicating the graduations are positioned ina-lignment with the graduations i which lare utilized in iinding and marking `the plumb and baseanglef cuts of rafters.

In a finding the lengths and marking the plumb and base angdek cuts oi rafters, for

example a 45% angle is to becut on the base i and plumb angle cuts oi' the rafters the blade 12 will then be moved upon its pivotL until the graduation 23 aligns with the graduation #1 indicated by the number 45 which will show that the rafters will be 17 .25 feet long and the respective ends oi the rafters will be properly marked.

It is, of course, to be understood that the invention `may be 4constructed in various other manners and the parts associated in different relations and, therefore, I do not p desire to'be limited in any manner except as set forth in the claims hereunto appended.

Havingthus described my invention what l claim is:

.1. Anv instrument'of the class described comprising angularly disposed arms, a segment of more than 90 degrees connecting the spaced ends of said arms, a pivoting boss oiiset inwardly from the junction of said armsand provided with an opening, concentric with said segment and the center ,ot

which forms the apices of the angles denoted on said segment, an arm pivoted'to saidl boss for co-action with said segment, said arm being formed of sheet metal bent to provide a hollow arm structure and provided with cutout portions in its sides forming inturned right angularly disposed clamping ears, and means for clamping said ears in gripping engagement against said segment -to lock the arm in adjusted positions.

2. An instrument of the class described comprising angularly disposed arms, ka segkment voit more than 90 degrees connecting y the 'spaced ends of said arms, al pivoting boss* 'offset inwardly from the junction of sai arms and provided with an'opening concentric with said segment and the centerv `of which forms the apices yof the angles denoted on said segment, an arm pivotedto said boss for co-action with said segment, said arm beingffoimed of sheet metal bent to provide va hollow arm structure and provided Awith cutout portions in its sides forming inturned right angularly disposed clamping ears, 'and means for clamping said ear in gripping engagement against said segment to lock' the arm in adjusted positions, inwardly inclining' reading tongues formed on said arm and being graduated, the center graduation aligning with the pivotal axis of said arm'.

3. In an instrment ofthe class described,

right angularly disposed arms, a segment of more than 90 degreesconnectingth'e spaced ends of said arms, a pivotal boss o'ii'setinwardly from the junction of said arms, a

movable arm pivotally connected toy said boss and having its pivotal axis and longitudinal center adapted to align with ,the ter- 1 minals of a 90l degree gradi'iated arch on said segment, the edges of said movable arm adapted to abut the edges ot said angularly disposed arms toilimit the pivotal movement of the movable arm, said movable arm provided with inturned portions, and' clamping means Jfor clamping the inner edges of vs 'aid intiirned portions in locking engagementwith said segment to lock said arm in adjusted positions. y

e. In anvins'trument of the classfdescribed, right angularly disposed arms, a segment of more than 90 degrees connecting the spaced movable arm, said' movable arm provided 15 ends of said arms, a pivotal boss offset inwith inturned portions, clamping means for l v Wardly from the junction of said arms, a clamping the inner edges of said inturned movable arm pivotally connected to said boss portions in locking .engagement With said 5 and having its pivotal axis and longitudinalr segment to look said arm in adjusted posicenter adapted to align With the terminals tions',l one of said right angularly disposed 2o of a 90 degree graduated arch on said segarms provided with spaced gauging notchesk ment, the edges of said movable arm adapted in its inner edge. f to abut the edges of said angularly disclosed y In testimony whereof I aiiiX my signature.

10 arms to limit the pivotal movement of the Y WILLIAM R. GREEN. 

